Reamer.



B n. Form. BEAMER.

APPLICATION FILED NOV- 811915. A

Patented Dec. 12, 1916.

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lpplcetiori filed. November t, 131.5, Sera- He. ri.

`ting tools for metal Working of the type having a head, provided with longitudinal `grooves errang-ed radially, and blades held 1n sind grooves.

y The object of the invention is to provide an improved tool in which the blades may be easily placed or removed; to provide 1m vproved means for fastening the blades in the grooves, said means consisting oi' Wedges which are driven in between the inclined, walls of the grooves and the inclined sides of the blades; and to provide improved means for the easy removal of seid pins keys, enabling `them to be quickly releema or backed 'out With these und other objects in ijieiv, the invention is hereinafter described and 'is :illustrated in the accompanying drawings, in Which Figure l is en elevation of the tool. Fig. f is e section on the line 2-2 of Fig. "l, Fig. 3 is e section on the lino 3 3 of l. Fig il is a, perspective ci? one ci the blades. Fig: 5 is a. perspective of one or the lockingp keys or pins. Fig. 6 is a partiel sectional View of e shell reorner forming e modification.

Referring specifically to the drawings, 6 indicates the shank of the tool and 7 the head thereof, reduced to form a neck 8 be 1tween the shank and the heed, through which neck are cross or diafmetricol bores or openings 9. The head is slotted lengthwise, the slotsbeing radially erranifed. The bock Wall l0 of each slot is flot and parallel to the axis of the tool. At its front Well, the slot has a groove 11 the surfaceot which is conical or curved and whichy "extends et an inclination tothe axis oit the tool, es shown at l2,- tapering inwardly vor toward the shank, and these grooves open at their ends into the cross bores 9 in the neck. The upper or inner ends of the grooves :ire closed oe shown at 30 to sustain the thrust or longi tudinel pressure on the blades.

The blades 13 are solid pieces of steel properly shaped to forro the cutting; edges,

t keys may sind these blades lit in the slots in the heed, The boclr of each blade is liet and rests' against the boel; wall i() olif the slot. llhe front well 'il of the blade is inclined or tapered od" toward the inner end thereof, with e shoulder 15 extending olong the t pered surface :uljacent the out; r edge of the binde. lil: ch locking pix, lli hos o curved or segn'lent-al surface ll lit the groove ll and has o, cated .sui-foce 18 to lit the adjacent inclined surface ll ot the blade, and the key long enough to project at its inner end, .into the cross bore 9, as shown in lge. l. rend 3. lllheo the blades are et opposite ifoints, the keys will project into each bore.

The tool is assembled by inserting.; the blades iny the slots end aflri'ving the Wedge keys intotlie key Way grooves endwise, tbe lrejvs thereby engaging; the blades 'with wei'lgng fiction und lookin-ftk the blades in the head. it is to be noter.. also, that the surfaces lil et the blades inc 1 as well :is iongitndinnllv end fore grip the blades wir e, litter action :is 'well ase. lonetndinol v' tion, the engaging sur i.' ele to the radins :is woll es to the heed. llhie locks the blades egoinst either longjitwli ,il or radial rement, pressing; the iirmljv to t 1r l n' against oc bock ,and innervells or the @lo in importent feature oi' the const-rr follows 'iro-m the projection oi the inner ends oi lie keys into the bores 9, Afor f be easily loosened. by inserting e, bevel tool or ber into the seid bores, to loosen and' irnoclr oiitthe keys and permit tbe removel of the blades, end the knocking out tool will oct directly on the ends oit" the lieve ln the modification simon in Fig. tl the shell Si@ hee e eircomlerenfini` ilengjfe ill. et the opper en( s ci? the grooves in which the keysere inserted, and the upper or inner ends of the lief/s extend through suitable -lioles in seid flange, es shown et 2Q', per" netting the lreys to be topped und. loosened by o herinner or the like, for the purpose el removing; the blades.

rlhe number `or? blades muy be verno, desired and verious other changes A v,carts may be milde, Within the scope 'o fol l owing; el eine s.

i leving thus described my invention, what CII ` blade in the slot having a flat longitudinally at one end of the recess whereby it may be land laterally inclined surface, and a wedge backed out by pressure applied to said end. 'key infthe slot, having a Hat inclined surface 6. A cutter head having a longitudinal tting against the said inclined surface of slot therein closed'at its inner end and a 5 the blade, to lock ther/same. in the slot. groove beside the slot, open at both ends, a

. 10 clined sur 2. Acutter head having'a slot therein, a blade in the slot and abutting at its end blade -in the slot having@ surface inclined against the closed end of the slot, and a both to the axis and-the radius of the head, wedge key in the groove, binding against the and-a Wedfge key inlythe-sloahaving a fiat inblade and exposed at its small end at the h b1 d ace fitting against said surface/of opening at one end of the groove.

7. A cutter head having a longitudinalVV '3. A cutter head having a slottheremb lslot therein closed at lts inner end, a groove one wall of the slot Shaving a longitudinally beside the slot open at both ends, and an inclined groove, a blade fitting in the slot opening communicating with the inner end 15 iand havinga flat surface opposite the groove of the groove,/a blade in the slot, and a inclined both to the axis and the radius of wedge key in the groove, beside the blade,

the head, and a wedge key in the groove, tsaid key projecting at its inner end into ting against said surface. said opening, 'whereby the key may be 4. A cutter head having a slot therein, the backed out by a tool inserted into said recess.

2 vfront side wall of the slot having a tapered 8. A cutter headhaving longitudinal slots, groove, a blade fitting in the slot and having grooves beside said slots, and an openin a dat side surface`inclined longitudinally through the head and communicating with and transversely, and a wedge key -in the the inner ends of said grooves, blades in the groove having a dat side, l-iltting against slots, and wedge keys .or the blades, in the said surface. grooves, said keys projecting at their inner 5. A cutter head having a recess therein smaller ends into said opening, for the purvopen at both Vends and one side wall of which pose stated. l

is vtapered longitudinally, a blade fitting in In testimony whereof, I hereunto affix my said recess, and a wedge key in said recess, signature..

'30 beside the blade, the small end of the key projecting throughand beyond the opening BION l). FORD. 

